Flushing-cistern.



R. H. PAUS.

FLUSHING CISTERN.

APPLICATION FILED DEC- I. 1913.

Patented June 8, 1915.

20mm 6 G m; 4% p m.

UNITED STATES PATENT OFFICE.

RUDOLPH HENRIK PA'US, OF SHIPLEY, ENGLAND.

FLUSHING-CISTERN.

Application filed December 1, 1913.

To all whom it may concern Be it known that I, RUDOLPH HENRIK Pans, asubject of the King of Great Britain, residing at 7 Victoria Park,Shipley, in the county of York, England, have invented certain new anduseful Iinprovements in Flushing-cisterns; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters or figures of reference marked thereon, which form a partof this specification.

This invention relates to flushing cisterns of the siphon type for waterclosets, urinals, and other appliances and has for its chief object toproduce a silent cistern and to eliminate the objectionable noise thatis caused by the inrush of air and water into the siphon when the waterin the cistern arrives at the level of the siphon inlet aperture. Inorder to obviate this objection it has been proposed to provide thesiphon with one or more pipes or passages of small bore which enter thesiphon at or about its highest level and extend to within a shortdistance above the level of the siphon inlet aperture. According to thisinvention a small hole is formed in each such pipe above the highestwater level in the cistern, the arrangement being such that when thewater is discharged from the cistern, air enters the small holes in thepipes of small bore and prevents any siphoning action therein, and assoon as the water level uncovers the end or ends of the small pipe orpipes, the air entering the same stops the siphoning action in thesiphon before the water reaches the level. of the siphon inlet aperture.The latter is consequently never uncovered and no gurgling noise causedby the sudden inrush of air and water to the siphon inlet aperture cantake place. Inrush of air and water to the pipes of small bore isprevented by the air entering the same through the small holes which arenot large enough to detrimentally affect the siphoning action of thesiphon. In order that the said invention may be clearly understood andreadily carried into effect the same is described with reference to theaccompanying diagram matic drawings which illustrate by way of exampleone embodiment of the invention.

Figures 1 and 2 are transverse and longi- Speeification of LettersPatent.

Patented June 8, 1915.

Serial No. 804,039.

,tudinal sections respectively of a flushing cistern provided withflushing apparatus in accordance with this invention. Fig. 3, is aninverted section taken on line 3 of Fig. 1 of the siphon and silencingpipes drawn to a lar 'er scale, and Fig. 4 is a plan of one of thesilencing pipes.

A indicates the siphon.

B B B indicate three silencing pipes and C indicates the supply pipe.The pipe B advantageously enters the siphon at its highest or centralpoint, and the other two pipes B B enter the siphon directly over therespective legs thereof, the lower end of each pipe terminating slightlyabove the level of the siphon inlet aperture a. Each pipe is formed witha small hole 6 already mentioned and in practice such hole is merely apin hole.

To silence the noise produced by the delivery of the water to thecistern after a flush has taken place the end of the supply pipe C orcock is advantageously connected with an inclined or curved pipe 0 whichpasses to the cistern below the lowest water lever therein, and may beformed with a small air hole 0 The invention hereinbefore described canbe applied to any existing siphon cistern whether employed inconjunction with urinals, water closets, or other appliances thatrequire flushing and whether the flushing apparatus is operatedautomatically or by hand.

I claim:

1. In a flushing-cistern, a siphon, a pipe connected thereto, said pipehaving an everopen air-inlet aperture above the normal water-level, andits open lower end above the level of the influx of the siphon.

2. In a flushing-cistern, a siphon, a pipe connected at its upper end tosaid siphon and having its lower end slightly above the level of theinflux end of the siphon, said pipe having a bore of relatively smalldiameter and having an ever-open air-inlet aperture above the normalwater-level.

3. In a flushing-cistern, a siphon, a plurality of pipes connected attheir upper ends to said siphon and having their lower ends slightlyabove the level of the influx end of said siphon, each of said pipeshaving a bore of relatively small diameter and having an ever-openair-inlet above the normal waterlevel.

4:. In a fiushing-cistern, a siphon, three pipes having bores ofrelatively small diamas my invention, I have signed my name eter, one o1SZLlCl pipes beingconneeted to the in presence of tWo subscribingWitnesses.

siphon at its bend, and one of the other pipes being connected to eachleg of said siphon, RUDOLPH HENRIK PAUS' 5 said pipes having ever-openair-inlet aper- Witnesses:

tLHQS above the normal Water-level. WILFRID DUNN,

In testimony that I claim the foregoing FRED HAMMOND.

Copies of this patent may be obtained for five cents each, byadrlressing the Commissioner of Patents, Washington, D. G.

